CN107009091B - A kind of manufacturing method of metallic mobile phone shell - Google Patents
A kind of manufacturing method of metallic mobile phone shell Download PDFInfo
- Publication number
- CN107009091B CN107009091B CN201610058107.0A CN201610058107A CN107009091B CN 107009091 B CN107009091 B CN 107009091B CN 201610058107 A CN201610058107 A CN 201610058107A CN 107009091 B CN107009091 B CN 107009091B
- Authority
- CN
- China
- Prior art keywords
- blank
- processing
- bottom wall
- cnc
- forming
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Telephone Set Structure (AREA)
- Casings For Electric Apparatus (AREA)
Abstract
The invention proposes a kind of manufacturing methods of metallic mobile phone shell, include: the nearly processing and forming step in blank front: the nearly processing and forming of CNC is carried out to the positive bottom wall of blank, so that the positive bottom wall thickness of blank is on the basis of mobile phone processing procedure product positive setting bottom wall thickness, remaining thickness surplus；The nearly processing and forming step in the blank back side: the nearly processing and forming of CNC is carried out to the bottom wall at the blank back side, so that the bottom wall thickness at the blank back side is the setting bottom wall size at the mobile phone processing procedure product back side；The net processing and forming step in blank front: the net processing and forming of CNC is carried out to the positive bottom wall of the blank, remove the thickness surplus, so that the positive bottom wall thickness of blank is the setting bottom wall thickness, solves the problems, such as handset shell deformation, and reduce the production cost of handset shell.
Description
Technical field
The present invention relates to the field shaping technique of handset shell more particularly to a kind of manufacturing methods of metallic mobile phone shell.
Background technique
Current phone is more and more thinner, and function is more and more, in the limited situation in interior of mobile phone space, only further subtracts
The thickness of thin handset shell, such as integrated smart phone thickness of shell require to be no more than the flat of 0.5mm and handset shell
Face degree is no more than 0.25mm, this is a greatly challenge for the smart phone that screen size is more than 5.2 inches.
Currently, there is apparent deformation, mobile phone using conventional computer numerical control processing CNC technology handset shell after molding
The machining stress in shell front (towards the side of mobile phone screen) is much larger than the machine of the handset shell back side (towards outside)
The flatness at the battery cover position of forming residual stress, especially handset shell is even up to 0.5mm, considerably beyond current phone
The requirement of shell product.The method for correcting the deformation of aluminium alloy handset shell, can be after completing CNC technique, using shaping mould
Correct the requirement of shape of product to finished product；CNC technique can also be changed using the methods of laser laser carving after completing CNC technique
The stress distribution of generation, to correct shape of product to meet the requirement of finished product.But these use the side of subsequent assistant orthopedic
Method increases the investment of other equipment, improves the production cost of handset shell.Therefore, it is necessary to a kind of systems of metallic mobile phone shell
Method is made, to solve the above-mentioned technical problems in the prior art.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of manufacturing methods of metallic mobile phone shell, solve handset shell
The problem of deformation, and reduce the production cost of handset shell.
The technical solution adopted by the present invention is that:
A kind of manufacturing method of metallic mobile phone shell, comprising: the nearly processing and forming step in blank front: to the positive bottom of blank
Wall carries out the nearly processing and forming of CNC, so that the positive bottom wall thickness of the blank is in the positive setting bottom wall thickness of mobile phone processing procedure product
On the basis of, remaining thickness surplus；The nearly processing and forming step in the blank back side: to the bottom wall at the blank back side carry out CNC closely at
Type processing, so that the bottom wall thickness at the blank back side is the setting bottom wall size at the mobile phone processing procedure product back side；Blank front only at
Type procedure of processing: the net processing and forming of CNC is carried out to the positive bottom wall of the blank, the thickness surplus is removed, so that the base
Expect that positive bottom wall thickness is the setting bottom wall thickness.
Preferably, the thickness surplus is 0.3mm~0.6mm.
Preferably, the thickness surplus is 0.3mm；The net processing and forming step in blank front, specifically includes: setting
The speed of mainshaft of CNC board is 8000 revs/min, and the process velocity of the net processing and forming of CNC is 800MM/ points, removes the thickness
Spend the 0.15mm in surplus；The speed of mainshaft that CNC board is arranged is 10000 revs/min, the processing speed of the net processing and forming of CNC
Degree is 800MM/ points, removes the 0.1mm in the thickness surplus；The speed of mainshaft that CNC board is arranged is 12000 revs/min, described
The process velocity of the net processing and forming of CNC is 600MM/ points, removes remaining 0.05mm in the thickness surplus.
Preferably, the CNC board is three axis machines, and the tool type of the three axis machine is face cutter, the end face milling
The material of knife is hard alloy.
Preferably, between the nearly processing and forming step in the blank front and the nearly processing and forming step in the blank back side, institute
State manufacturing method, further includes: remove the burr that the nearly processing and forming step in the blank front remains on the blank；Cleaning institute
State clamp tool used in the nearly processing and forming step in blank front.
Preferably, after the net processing and forming step in blank front, the manufacturing method, further includes: remove the base
The net processing and forming step in material front remains on the burr on the blank；The blank is surface-treated, mobile phone system is obtained
Finished product.
Preferably, before the nearly processing and forming step in the blank front, the manufacturing method, further includes: according to the hand
The size of mechanism finished product obtains the blank using hardware method for processing forming.
Preferably, the blank is aluminum alloy material.
By adopting the above technical scheme, the present invention at least has following effect:
The manufacturing method of metallic mobile phone shell of the invention solves the problems, such as metallic mobile phone housing distortion, especially super
The thin more scabrous problem on deformation of large area aluminium alloy handset shell, improves the Product Precision of metallic mobile phone shell.In addition, should
Manufacturing method is simple, without additionally increasing other process equipments, improves the output efficiency of metallic mobile phone shell, reduces production
Cost.
Detailed description of the invention
Fig. 1 is the flow chart of the manufacturing method of the metallic mobile phone shell of first embodiment of the invention；
Fig. 2 is the flow chart of the manufacturing method of the metallic mobile phone shell of second embodiment of the invention；
Fig. 3 is the flow chart of the manufacturing method of the metallic mobile phone shell of third embodiment of the invention；
Fig. 4 is the flow chart of the manufacturing method of the metallic mobile phone shell of fourth embodiment of the invention；
Fig. 5 is the flow chart of the manufacturing method of the metallic mobile phone shell of fifth embodiment of the invention.
Specific embodiment
Further to illustrate the present invention to reach the technical means and efficacy that predetermined purpose is taken, below in conjunction with attached drawing
And preferred embodiment, the present invention is described in detail as after.
The manufacturing method of metallic mobile phone shell provided by the invention, efficiently solves asking for metallic mobile phone housing distortion
Topic, and reduce the production cost of metallic mobile phone shell.The system of metallic mobile phone shell of the invention will be described in detail belows
Make method and its each step.
Term " processing procedure product " used in this application is not carry out the semi-finished product for the rear processing procedure process such as being surface-treated, so processing procedure
The size of product includes the surplus that the size of manufactured goods need to be removed plus rear processing procedures such as surface treatments, for example polishing will remove
0.03mm, sandblasting or anodized need to remove 0.01mm.
First embodiment
The manufacturing method of metallic mobile phone shell as shown in Figure 1 includes: the nearly processing and forming step S10 in blank front, blank
The nearly processing and forming step S20 in the back side and the net processing and forming step S30 in blank front, above-mentioned steps are completed in CNC machining center.
Wherein, the nearly processing and forming step S10 in blank front: carrying out the nearly processing and forming of CNC to the positive bottom wall of blank, so that
The positive bottom wall thickness of blank is on the basis of mobile phone processing procedure product positive setting bottom wall thickness, remaining thickness surplus, to blank
Positive bottom wall thickness carries out preparatory processing, retains the positive bottom wall thickness of mobile phone processing procedure product in the premise of setting bottom wall thickness
Under, thickness surplus is reserved, avoids the prior art to the disposable processing in blank front, so that excessive machine occurs in blank front
Forming residual stress.The material of blank can be aluminium alloy.
Then, it executes the nearly processing and forming step S20 in the blank back side: the nearly processing and forming of CNC is carried out to the bottom wall at the blank back side,
So that the bottom wall thickness at the blank back side is the setting bottom wall size at the mobile phone processing procedure product back side.Due to the bottom wall at the mobile phone processing procedure product back side
Thickness is much smaller than its positive bottom wall thickness, so in this step disposably by the bottom wall thickness milling at the blank back side to setting
Bottom wall size biggish residual stress can't occur at the blank back side.
Finally, executing the net processing and forming step S30 in blank front: the net processing and forming of CNC is carried out to the positive bottom wall of blank,
Thickness surplus is removed, so that the positive bottom wall thickness of blank is setting bottom wall thickness.In this step by step S10 reserve
The removal of thickness surplus, the step is on the basis of step S10, the positive thickness surplus of milling blank, by the positive bottom wall of blank
Thickness is machined to setting bottom wall thickness.
By above step, during CNC is processed, use discharges and corrects step by step mach the present embodiment
Residual stress realizes that the surface stress of mobile phone processing procedure product front and back is balanced, solves the problems, such as metallic mobile phone housing distortion,
The problem on deformation of especially ultra-thin large area aluminium alloy handset shell.
Preferably, the nearly processing and forming step S10 in blank front, the nearly processing and forming step S20 in the blank back side and blank
Positive net processing and forming step S30 is using conventional CNC machined parameters.
Second embodiment
On the basis of first embodiment, the thickness surplus of the present embodiment is 0.3mm~0.6mm.Many experiments prove, thick
Degree surplus is above range value, can effectively solve the problems, such as that handset shell deforms.
Further, thickness surplus can be 0.3mm.As shown in Fig. 2, in the net processing and forming step S30 in blank front,
Specifically include: step S300: the speed of mainshaft of setting CNC board is 8000 revs/min, and the process velocity of the net processing and forming of CNC is
800MM/ points, remove the 0.15mm in thickness surplus.Step S301: the speed of mainshaft of setting CNC board is 10000 revs/min,
The process velocity of the net processing and forming of CNC is 800MM/ points, removes the 0.1mm in thickness surplus.Step S302: setting CNC board
The speed of mainshaft be 12000 revs/min, the process velocity of the net processing and forming of CNC is 600MM/ points, is removed remaining in thickness surplus
0.05mm。
Preferably, CNC board is three axis machines, and the tool type of three axis machines is face cutter, the material of face cutter
The amount of feeding of cutter is set as 0.15mm, removes the 0.15mm in thickness surplus in step S300 for hard alloy；In step
In rapid S301, the amount of feeding of cutter is set as 0.1mm, removes the 0.1mm in thickness surplus；In step s 302, cutter is set
The amount of feeding be 0.05mm, remove thickness surplus in remaining 0.05mm.
In this embodiment, the thickness surplus reserved in step S10 is removed step by step, due to what is used in each step
The speed of mainshaft of CNC board is different, and process velocity is also not close identical, can effectively reduce blank front in machining process
Residual stress.
3rd embodiment
As shown in figure 3, on the basis of first embodiment and second embodiment, in the nearly processing and forming step in blank front
Between S10 and the nearly processing and forming step S20 in the blank back side, the manufacturing method of the metallic mobile phone shell of the present embodiment, further includes: step
Rapid S40: the nearly processing and forming step S10 in removal blank front remains on burr and step S50 on blank: cleaning blank is just
Clamp tool used in the nearly processing and forming step S10 in face.Removal remains in base to step S40 in time after step S10 completion
Burr on material keeps the cleaning of blank, and in step s 50 that the clamp tool used in step slo is cleaned, in case
It is used in following step, improves the precision of blank processing.
Fourth embodiment
As shown in figure 4, on the basis of 3rd embodiment, after the net processing and forming step S30 in blank front, the present embodiment
Metallic mobile phone shell manufacturing method, further includes: step S60: the removal blank net processing and forming step S30 in front remains on base
Burr and step S70 on material: blank is surface-treated, mobile phone manufactured goods are obtained.The step S60 of the present embodiment is gone
Except remaining on the burr on blank in step S30 implementation procedure, and step S70 is surface-treated blank, such as sandblasting, throws
The processing such as light, finally obtains mobile phone manufactured goods.
5th embodiment
As shown in figure 5, on the basis of first embodiment, before the nearly processing and forming step S10 in blank front, the present embodiment
Manufacturing method, further includes: step S80: according to the size of mobile phone manufactured goods, blank is obtained using hardware method for processing forming.Base
Material can be the metal materials such as aluminium alloy, according to the size of mobile phone manufactured goods, obtain blank using hardware method for processing forming.
Below with the manufacturing method of a specific embodiment detailed description of the present invention metallic mobile phone shell.
Firstly, the size based on mobile phone manufactured goods in product structure design, using such as punching press of hardware method for processing forming, forging
Pressure etc. obtains blank；
Secondly, setting CNC machined parameters, carry out the nearly positive bottom of processing and forming blank for the first time using CNC processing method
Wall, on the basis of mobile phone processing procedure product positive setting bottom wall thickness, remaining thickness surplus is the positive bottom wall thickness of blank
0.3mm；
Then, removal CNC processes remaining burr, and cleans CNC and process the clamp tool used；
Then, the bottom wall at the blank back side is processed using CNC machined parameters identical with nearly processing and forming for the first time,
So that the bottom wall thickness at the blank back side is the setting bottom wall size at the mobile phone processing procedure product back side；
Furthermore net processing and forming is carried out to blank front using CNC machined parameters identical with nearly processing and forming for the first time,
Thickness surplus 0.3 is removed, the positive bottom wall thickness of product is finally processed as setting bottom wall thickness；
The detailed machined parameters of net processing and forming are as follows:
CNC board: tri- axis machine of BROTHER；
Cutter material: carbide cutter tool；
Tool type: face cutter.
First time net processing and forming parameter:
The speed of mainshaft: 8,000 revs/min；
Process velocity: 800MM/ points；
It feeds (bite): 0.15mm.
Second of net processing and forming parameter:
The speed of mainshaft: 10,000 revs/min；
Process velocity: 800MM/ points；
It feeds (bite): 0.10mm.
The net processing and forming parameter of third time:
The speed of mainshaft: 12,000 revs/min；
Process velocity: 600MM/ points；
It feeds (bite): 0.05mm.
Finally, removal remaining burr of the net processing and forming of CNC etc., and surface is carried out to blank under the protection of special fixture
Processing, such as polishing, sandblasting and anodic oxidation etc., finally obtain mobile phone manufactured goods.
By the explanation of specific embodiment, the present invention can should be reached technological means that predetermined purpose is taken and
Effect is able to more deeply and specifically understand, however appended diagram is only to provide reference and description and is used, and is not used to this
Invention limits.
Claims (7)
1. a kind of manufacturing method of metallic mobile phone shell characterized by comprising
The nearly processing and forming step in blank front: the nearly processing and forming of CNC is carried out to the positive bottom wall of blank, so that the blank is positive
Bottom wall thickness on the basis of mobile phone processing procedure product positive setting bottom wall thickness, remaining thickness surplus；
The nearly processing and forming step in the blank back side: the nearly processing and forming of CNC is carried out to the bottom wall at the blank back side, so that the blank
The bottom wall thickness at the back side is the setting bottom wall size at the mobile phone processing procedure product back side；
The net processing and forming step in blank front: the net processing and forming of CNC is carried out to the positive bottom wall of the blank, removes the thickness
Surplus, so that the positive bottom wall thickness of the blank is the setting bottom wall thickness；
The thickness surplus is 0.3mm；
The net processing and forming step in blank front, specifically includes:
The speed of mainshaft that CNC board is arranged is 8000 revs/min, and the process velocity of the net processing and forming of CNC is 800MM/ points, is removed
Remove the 0.15mm in the thickness surplus；
The speed of mainshaft that CNC board is arranged is 10000 revs/min, and the process velocity of the net processing and forming of CNC is 800MM/ points,
Remove the 0.1mm in the thickness surplus；
The speed of mainshaft that CNC board is arranged is 12000 revs/min, and the process velocity of the net processing and forming of CNC is 600MM/ points,
Remove remaining 0.05mm in the thickness surplus.
2. the manufacturing method according to claim 1, which is characterized in that the thickness surplus is 0.3mm~0.6mm.
3. the manufacturing method according to claim 1, which is characterized in that the CNC board is three axis machines, the three axis machine
Tool type is face cutter, and the material of the face cutter is hard alloy.
4. manufacturing method according to any one of claim 1 to 3, which is characterized in that close form in blank front adds
Between the nearly processing and forming step in the rapid and described blank back side of work step, the manufacturing method, further includes:
Remove the burr that the nearly processing and forming step in the blank front remains on the blank；
Clean clamp tool used in the nearly processing and forming step in the blank front.
5. manufacturing method according to claim 4, which is characterized in that after the net processing and forming step in blank front,
The manufacturing method, further includes:
Remove the burr that the net processing and forming step in blank front remains on the blank；
The blank is surface-treated, mobile phone manufactured goods are obtained.
6. manufacturing method according to claim 5, which is characterized in that before the closely processing and forming step of the blank front,
The manufacturing method, further includes:
According to the size of the mobile phone manufactured goods, the blank is obtained using hardware method for processing forming.
7. the manufacturing method according to claim 1, which is characterized in that the blank is aluminum alloy material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610058107.0A CN107009091B (en) | 2016-01-28 | 2016-01-28 | A kind of manufacturing method of metallic mobile phone shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610058107.0A CN107009091B (en) | 2016-01-28 | 2016-01-28 | A kind of manufacturing method of metallic mobile phone shell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107009091A CN107009091A (en) | 2017-08-04 |
| CN107009091B true CN107009091B (en) | 2019-08-02 |
Family
ID=59438560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610058107.0A Expired - Fee Related CN107009091B (en) | 2016-01-28 | 2016-01-28 | A kind of manufacturing method of metallic mobile phone shell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107009091B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108620830B (en) * | 2018-06-06 | 2020-07-17 | 惠州至精精密技术有限公司 | Production method of power key and volume key integrated key board |
| CN112621121B (en) * | 2020-12-07 | 2022-07-22 | 贵州精立航太科技有限公司 | Shell machining method and straightening die device thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120134404A (en) * | 2011-06-02 | 2012-12-12 | (주)이.씨테크날리지 | A method for fabricating a mobile phone case to which a rf card is embedded |
| CN102886640A (en) * | 2012-09-04 | 2013-01-23 | 昆山市源丰铝业有限公司 | Method for machining thin-wall aluminum alloy part |
| CN102974980A (en) * | 2012-11-26 | 2013-03-20 | 天津市中环高科技有限公司 | Multi-surface milling processing technology for injection molding piece of rear cover of mobile phone |
| CN103286522A (en) * | 2012-02-28 | 2013-09-11 | 比亚迪股份有限公司 | Preparation method of aluminum alloy casing of electronic product |
| CN103506808A (en) * | 2012-06-27 | 2014-01-15 | 廖述源 | Manufacturing method and product of slim shell |
| CN104551562A (en) * | 2014-12-16 | 2015-04-29 | 广东欧珀移动通信有限公司 | Processing method of metal middle frame mobile phone shell structure |
| CN104690504A (en) * | 2015-02-02 | 2015-06-10 | 奥捷五金(江苏)有限公司 | Machining method for stainless steel mobile phone rear cover |
-
2016
- 2016-01-28 CN CN201610058107.0A patent/CN107009091B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120134404A (en) * | 2011-06-02 | 2012-12-12 | (주)이.씨테크날리지 | A method for fabricating a mobile phone case to which a rf card is embedded |
| CN103286522A (en) * | 2012-02-28 | 2013-09-11 | 比亚迪股份有限公司 | Preparation method of aluminum alloy casing of electronic product |
| CN103506808A (en) * | 2012-06-27 | 2014-01-15 | 廖述源 | Manufacturing method and product of slim shell |
| CN102886640A (en) * | 2012-09-04 | 2013-01-23 | 昆山市源丰铝业有限公司 | Method for machining thin-wall aluminum alloy part |
| CN102974980A (en) * | 2012-11-26 | 2013-03-20 | 天津市中环高科技有限公司 | Multi-surface milling processing technology for injection molding piece of rear cover of mobile phone |
| CN104551562A (en) * | 2014-12-16 | 2015-04-29 | 广东欧珀移动通信有限公司 | Processing method of metal middle frame mobile phone shell structure |
| CN104690504A (en) * | 2015-02-02 | 2015-06-10 | 奥捷五金(江苏)有限公司 | Machining method for stainless steel mobile phone rear cover |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107009091A (en) | 2017-08-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102413210B (en) | Production process of frame bracket in mobile phone | |
| CN103586640B (en) | The processing method of the yielding taper revolving body of the many openings of a kind of thin-walled and revolving body | |
| CN106410073B (en) | A kind of preparation method of aluminum alloy battery lid, aluminum alloy battery lid and electronic equipment | |
| CN108262478B (en) | Manufacturing method of 06Cr19Ni10 stainless steel honeycomb thin-wall component, electronic equipment and system | |
| CN107717030B (en) | A kind of processing method of the long boss of Titanium alloy TA15 thin-walled | |
| CN107009091B (en) | A kind of manufacturing method of metallic mobile phone shell | |
| CN106132148A (en) | The molding mode of housing, case of electronic device and electronic installation | |
| CN104811513A (en) | Metal rear cover of mobile electronic product and manufacturing technology thereof | |
| CN102157714B (en) | Method for machining battery cover, battery cover and mobile terminal of battery cover | |
| CN103007502A (en) | Manufacturing method for striking panel of golf club head | |
| WO2018001071A1 (en) | Method of forming through hole in metal member, electronic apparatus housing, and electronic apparatus | |
| CN105311801A (en) | Manufacturing method for hitting panel of golf club head | |
| CN105478603A (en) | Splitting process for automobile die | |
| CN105414899A (en) | Processing method for annular thin-walled structural component with single side cross section to be parabola | |
| CN104248832A (en) | Manufacturing method of arc-shaped striking panel of golf head | |
| CN102658466B (en) | Numerical control machining method of whole 'glasses' type large-size titanium alloy part | |
| JP2013215752A (en) | Incremental forming method of metal plate | |
| CN107984161A (en) | A kind of processing method of high frequency box body inner waveguide chamber | |
| CN108672672B (en) | Manufacturing method of aluminum alloy servo shell of automobile steering gear supporting seat | |
| CN203356785U (en) | Electric spark machining device for local thinning of sheet part with complex shape | |
| CN103934358B (en) | A kind of numerical control press elliptical aperture blanking die and elliptical aperture blanking method | |
| CN102794611B (en) | High-precision thin part auxiliary tool equipment | |
| CN106944793B (en) | A kind of processing method of elongated plate part | |
| CN104668683A (en) | Vertical indexing mechanism and thin wall special-shaped part machining method through same | |
| CN102211268A (en) | Manufacture process of automobile generator finish-forged claw pole capable of reducing noise |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190802 Termination date: 20220128 |